Low-Temperature Hydrothermal Carbonization of Fresh Pig Manure: Effects of Temperature on Characteristics of Hydrochars

被引：22
作者：
Song, Chengfang [1 ]
Zheng, Huabao [2 ]
Shan, Shengdao [2 ]
Wu, Shengchun [3 ,4 ]
Wang, Hailong [5 ]
Christie, Peter [2 ]
机构：
[1] Zhejiang Agr & Forestry Univ, Sch Environm & Resource Sci, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Hangzhou 311300, Zhejiang, Peoples R China
[2] Zhejiang Agr & Forestry Univ, Sch Environm & Resource Sci, Hangzhou 311300, Zhejiang, Peoples R China
[3] Zhejiang Agr & Forestry Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Sch Environm & Resource Sci, Environm Engn Discipline, Hangzhou 311300, Zhejiang, Peoples R China
[4] Zhejiang Agr & Forestry Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Sch Environm & Resource Sci, Sci Discipline, Hangzhou 311300, Zhejiang, Peoples R China
[5] Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Guangdong, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL ENGINEERING | 2019年 / 145卷 / 06期
关键词：
Hydrochars; Hydrothermal carbonization; Low temperatures; Pig manure; SEWAGE-SLUDGE; SOLID-FUEL; COMBUSTION BEHAVIOR; ENERGY-PRODUCTION; RESIDENCE TIME; HEAVY-METALS; WASTE; CONVERSION; BIOCHAR; BIOMASS;
D O I：
10.1061/(ASCE)EE.1943-7870.0001475
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The impacts of temperature on the characteristics of hydrochars from pig manure (PM) following hydrothermal carbonization (HTC) at 140 degrees C-220 degrees C for 1h were investigated. The total organic carbon (TOC) content was 35.7%-39.1% and the total contents of nitrogen (N), phosphorus (P), and potassium (K) were 7.9%-8.1% in the hydrochars with yields of 97.4%-53.5%. The hydrochars had high nutrient recovery rates, and the contents of TOC, N, P, ash, and fixed carbon increased whereas those of K and volatiles decreased with increasing temperature. Fourier transform infrared (FTIR) spectroscopy and mass ratio of hydrogen to carbon (H/C) showed continuing aromatization of the hydrochars with increasing temperature. The characteristics of the hydrochars and the derivative thermogravimetry curves confirm that the composition of the hydrochars changed dramatically at 160 degrees C-180 degrees C, which was found to be a suitable temperature for low-temperature hydrothermal carbonation for fresh PM. However, the hydrochars were weakly acidic and the concentrations of Cu and Zn exceeded the standard limits for organic fertilizers.
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页数：7
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